Car-roof.



B. S. WARREN & S. HERBERT.

GAR ROOF.

APPLICATION FILED JUNE 9, 1906.

Patented Sept. 7, 1909.

2 SHEETSSHEET 1.

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GAR ROOF.

APPLICATION FILED JUNE 9, 1906..

Patented Sept. 7; 1909.

2 SHEETS-SHEET 2.

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' AMUEL -HEH5E/?7'- l/V/T/YESSES UNITED STATES PATENT OFFICE.

BENJAMIN SJWARREN AND SAMUEL HERBERT, OF DETROIT, MICHIGAN, ASSIGNORS TOHUTCHINS CAR ROOFING COMPANY, 011 DETROIT, MICHIGAN,'A CORPORATION OFMICHIGAN.

CAR-ROOF.

933,143. Specification of Letters t- Patented Sept. '7, 1909.Application filed June 9, 1906. Serial No. 320,911.

To all whom it may comem: desirable at the peak to have an upstand- Beit known that we, BENJAMIN S. VVAR- HEN and SAMUEL HERBERT, citizens ofthe United States of America, residing at Detroit, in the county ofWayne and State of Michigan, have invented certain new and usefulImprovements in Car-Roofs, of which the following is a specification,reference being had therein to the accompanying drawmgs. 1

The invention relates to new and useful improvements in carroofs, andconsists'particularly in .the construction of the sheets having upturnedflanges at the side and peak so asto make a substantially pan-shapedcorner with corrugations or bends in one or both of the flanges of sucha nature as not to break the metal, or bend it at such a sharp angle asto break throu h the galvanizing or 'tinning usually app ied thereto;and further in the construction of such a roof sheet and such a cornerconstruction, combined with involute flanges at the sides; and furtherin the construction, arrangement and combination of the various parts asmore fully hereinafter described and particularly pointed out in theclaim.

In the 61:3. Figure 1 is a perspective view of a sheet or a metal roofas used on cars, and embodying our improvementv as applied to a sheethaving the involute side flanges; Figs. 2 and 3 are perspective views ofthe corner of the sheet; 4 is a plan view of the corner; Fig. 5 is asection through a car roof showing portions of two sheets on oppositesides, as in position on the car; Fig. 6 is 2. Ian view of the blankfrom which the spe estructure shown in Fig. 1 is preferablyshaped; Fig.7 is a plan view of such a corner construction applied to a sheet withvertical upstanding flanges on the side and peak; Fig. 8 is a sectionthrough such sheet; Fig. 9 is a plan similar to Fi 7 showing thecorrugations or bends appiied in both the side and the peak flange; andFig. 10 is a perspective view of the old and weil known e of cornerconstruction employed in making pans or pan-shaped sheets for metalroofs.

In the present state ofthe art sheet metal roofs are made of sheetswhich extend from the peak to the eaves of the car, and are connected tother at their sides by various kinds of oints or by various means; It ising flange, so that in a storm the rain driven by the wind will notdrive laterally acrossthe ends of thesheet, and on the roof between theedges of the sheet at the peak. It has been more or less customary tomake such an upstanding flange at the peak, and in doing so a verycommon form of corner construction has been employed (such as shown inFig. 10), in which the lap or fold of metal projecting after the flangeshave been bent up and, as shown at A (Fig. 10), is bent around parallelto. and pressed'against one of the flanges on the sheet. Thisconstruction is objectionable, or any other construction isobjectionable, in which sharp or acute bends are'required in the metal,because such bends will crack or break the galvanizing or tinningusually applied to such sheets, and they will thus quickly rust at thisoint and cause a leak at the peak, which 1s the worst place -to have theleak, as the water will run down beneath the plates and thus rot out thewhole width of the roof. Our invention is intended to make suchpan-shaped corner in the sheet and yet do it with any desired form ofside flange without the necessity of sharp bends in the metal, whichwill break the galvanizing or tinning.

A represents a sheet of metal which is desired to be shaped into a roofsheet. In Fig. 6 we have shown the blank from whichis preferably formedthe sheet shown in Fig. 1,

the flanges a at the sides being bent up into the involute upstandingportions B, the flap I) being bent downward to form the portion C, whichis at the eaves of the car and forms the securing flange at the eaves.The portion o'is bent up to form the peak flange D. In bending this upwe do it with dies or tools in such a way as to form the curved cornerE, and also bend the flange D, as for instance at F, witha gradual bend,i. aforming a curve or corrugation which takes up the excess of metalwithout the necessity of forming any sharp angles or bends therein, andthus without any breaking of the galvanizing or tinning hovering thesheet.

In Fig. 8 we have shown a section through a sheet in which the sideflange, instead ofbeing an involute flangeas shown at B, is simply anupstanding vertical flange, G, and

in Fig. 7 we have shown the same curved corner E and the samecorrugation or bend F, as shown in Figs." 1, 2 and 3, only applied to asheet made with the side flange, as in Fig. 8. a

In Fig. 9 we have shown a curved corner E, but we have showncorrugations H I in both the side flange G and the peak flange D. Inthis case neither the corrugation H or I need be as deep as the singlecorru ation F, s the corrugation being simply su cient to take up theexcess'of metal which in the or dinary construction goes into the flapA".

\Vith this construction We are enabled to make a sheet pan-shaped at thepeak and tinuous flan sides thereo open crimps therein adjacent thecorners of the sheet.

without any sharp bends, which will break the galvanizing and yet obtainall the advantages of pre enting a leak by the driving rains at thispoint.

,What we claim as our invention is,

In a car roof, a metal sheet having a con- 20 e extending around the topand said flange being provided with In testimony whereof we aflix oursigna- 25' tures in presence of two witnesses.

BENJAMIN s. WARREN. SAMUEL HERBER'r.

Witnesses CARLYLE E. LA'r'rA, V. D. THOMPSON.

